Help with new 125 gallon build

Simon,

If I were to add more "new" sand to my tank, would that be a problem or would it cause a mini cycle or something?
 
It depends on how much you add at a time. A large volume at one time will definitely cause a mini cycle and I would avoid that if I were you. Try to add a small amount once a week will be much safer. Remember to monitor your ammonia and nitrite while doing that.
 
Ok, thanks Simon, thats what i thought. My green Haddoni just wont stay put and I'm thinking of adding more sand to give him a deeper sandbed.
 
Simon, do you happen to have pics on how you took apart the BH1450 for cleaning? Are you supposed to unscrew the big silver screw on the housing and then the smaller one found inside of that?
 
tassod said:
Simon, do you happen to have pics on how you took apart the BH1450 for cleaning? Are you supposed to unscrew the big silver screw on the housing and then the smaller one found inside of that?
Click to expand...

For just cleaning you only need to remove the 4 hex screws and take the cover off. However if you need to remove or replace the impeller assembly, you will need to unscrew the big silver screw (use a quarter) and then use a wooden dowel to gently tap the assemby until it separates from the motor housing. The little screw inside, I believe, is to further disassemble the impeller assembly. I have tried to loosen up that screw without any success as I was afraid I might break it since it is made of ceramic. I think the most I could do is to remove the impeller assembly from the motor housing in case I need to replace it.

When I bought the backup pump it came with two extra impeller assemblies. However only one of them has the ceramic shaft. This is the impeller assembly.


The little screw in this impeller assembly is stainless steel but the newer one are made of ceramic. I don't see any need to further disassemble this if I just need to replace the entire assembly.
 
Thanks Simon for the pics on the pump. I noticed the 4 screws but wasn't exactly sure that those were the ones that i needed to take out for cleaning. So once i take the cover off i can just soak the impeler or do i have to remove it to do that?
 
tassod said:
Thanks Simon for the pics on the pump. I noticed the 4 screws but wasn't exactly sure that those were the ones that i needed to take out for cleaning. So once i take the cover off i can just soak the impeler or do i have to remove it to do that?
Click to expand...

When I cleaned mine for the first time I removed the impeller assembly but after I found out I couldn't further disassemble the impeller I realized I didn't really need to remove the impeller. I just used a tooth brush and cleaned it with diluted muriatic acid. I think the main goal is to remove any large debris, sand or rocks that sucked into the pump. There wasn't much calcium build up in mine. Keep in mind, I ran mine for over a year before I cleaned it.
 
hmm...i guess since mine has only been running since January i probably shouln't worry about it right now. I figured i could hook up my back up and take my time cleaning out the old one. Manual says to clean it every 2-3 months.
 
Simon, been having issues this past week with some of my corals. The right side of my bubble coral is not oppening up, my long tentacle plate coral looks like a pancake most of the day and some zoas i have look like they are dieing. Also my flowerpot that i just got last week all of a sudden on Saturday started to recede and this morning the skeleton of that flowerpot is totally white. Everything else along with all the fish are doing fine. I wanted to double check my levels so I took a sample to my LFS last Friday afternoon. They said my Cal was 490, my Alk was 11.8 and my Mag was 1500. The only real thing that i've changed is doing my 3 gallon a day water change versus weekly. Would that cause such a problem? Since my water test Friday, i've turned off my dosing pumps completely. Yesterday afternoon I took new tests and they were Cal 450, Alk 9.4 and i didnt check Mag. Also the LFS tested for Phospate which was like .02 and Nitrate which was less than 2ppm. Here are some pics of the corals:



Flower pot pic last Saturday..today its white.


LT plate coral
 
Tasso, your alk was quite high which could have led to the demise of the corals. I think it was the right thing to do to turn off your dosing system as your calcium is high also. Honestly I don't know what else are causing problems for your corals. Something in the water are off causing the problem and the easiest fix can be just a water change of 10-25%. Good luck.
 
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